public static void LazilyAssertCount <T>(ref IEnumerable <T> sequence, int requiredCount)
{
//first try to assert immediately (non-lazily)
var list = sequence as ICollection;
if (list != null)
{
if (list.Count > requiredCount)
{
CountAssertionEnumerator <T> .ThrowMinimumNotAttainedException(requiredCount, list.Count);
}
if (list.Count < requiredCount)
{
CountAssertionEnumerator <T> .ThrowMaximumExceededException(requiredCount, list.Count);
}
return;
}
sequence = CountAssertionEnumerator <T> .Exactly(sequence, requiredCount).ToEnumerable(false).EnsureSingleEnumerationDEBUG();
}
